Manarang, Miguel S. <br/><br/>
Piscicidal effect of derris (Derris elliptica Benth) on catfish (Clarias batrachus)  [manuscript] / 
Miguel S. Manarang. 
 - Magalang, Pampanga :  Pampanga Agricultural College,  2011. 
 - 63 pages ;  27 cm.